alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed JS/Magecart Domain in TLS SNI (manag .icu)"; flow:established,to_server; tls.sni; content:"manag.icu"; bsize:9; reference:url,twitter.com/felixaime/status/1263134882991046658; classtype:domain-c2; sid:2030194; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_05_20, deployment Perimeter, malware_family JS_Magecart, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)